What does a real meteorite look like, is it a meteorite?

You can go to the Internet and search for ** in this regard.

Meteorite is also called"Meteorites"It is the unburned stone, iron, or a mixture of stone-iron material that is scattered on the surface of the Earth or other planets by cosmic meteors or dust fragments that have left their original orbits outside the Earth.

Because meteorites are from outer space, the determination of the authenticity of meteorites requires instrument identification, and the naked eye only has an auxiliary role.

To determine whether a sample is a meteorite, the following aspects can be considered:

1.Molten crust: Before the meteorite falls to the ground, it has to pass through the dense atmosphere, and the meteorite rubs with the atmosphere during the landing process to produce high temperatures, causing the surface to melt and form a thin layer of molten crust.

As a result, the surface of the newly landed meteorite has a black molten crust with a thickness of about 1 mm.

2.Surface Air Marks: In addition, due to the interaction between the meteorite and the air current, the surface of the meteorite will also leave many air marks, like handprints pressed by the finger.

3.Internal metals: Iron meteorites and stony-iron meteorites are internally composed of metallic iron, which has a high nickel content (5-10%). Chondrites also have metal particles inside, and fine metal particles can be seen on fresh fracture surfaces.

4.Magnetism: Because most meteorites contain iron, 95% of meteorites are attracted by magnets.

5.Chondrites: Most meteorites are chondrites (90% of the total), and these meteorites contain a large number of millimeter-sized silicate spheres called chondrites. Round chondrites can be seen on the fresh fracture surface of chondrites.

It looks like a meteorite on the surface, and you need to find an expert to identify whether it is true or not.

When meteorites fly at high altitudes, the surface temperature reaches several thousand degrees. At such high temperatures, the surface of the meteorite melts into liquid. Later, due to the blockage of the dense atmosphere in the lower layers, his speed became slower and slower, and the molten surface cooled down, forming a thin crust called "molten crust".

The molten shell is very thin, generally around 1 mm, and the color is black or brown. In the process of cooling the molten shell, the traces of air flowing on the surface of the meteorite are also retained, which are called "gas marks". The air mark looks much like a finger print pressed on the dough.

Molten crusts and air marks are the main features of the surface of meteorites. If you see a rock or iron with such a molten shell or air mark on its surface, you can immediately conclude that it is a meteorite. However, some meteorites that fall down are older, due to long-term wind, sun and rain, the molten shell falls off, and the air mark is not easy to identify, but that doesn't matter, there are other ways to identify it.

A stony meteorite looks a lot like a rock on Earth, and if you weigh it with your hands, you will feel that it is heavier than a rock of the same volume. Stone meteorites generally contain a few percent of iron, which is magnetic, and you will feel it when you try it with a magnetite. In addition, if you look closely at the cross-section of the stony meteorite, you will find that there are quite a few small chondrites.

Chondrites are generally about 1 mm, but there are also large to more than 2 3 mm, and more than 90% of stony meteorites have such chondrites, which are produced when meteorites are generated. It is an important marker for identifying stony meteorites. The main components of iron meteorites are iron and nickel.

Among them, iron accounts for about 90%, and the nickel content is generally between 4 and 8%, and the nickel content in the earth's natural iron is generally not so much. A section is cut on an iron meteorite, polished, and eroded with 5% nitric acid alcohol, and the shiny end face will show special stripes, like a lattice. This is because the iron meteorite itself is unevenly distributed, some places contain more nickel, some places have less, the part with more nickel content is chemically stable, not easy to be corroded by acid, and the part with less nickel content is corroded by acid and becomes rough and dull, so that these bright and dark parts form a lattice-like stripe.

These streaks occur with the exception of a very small number of meteorites with a very high nickel content. This is one of the main methods of identifying iron meteorites. Stony-iron meteorites are extremely rare and are composed of stone and iron, and it contains roughly equal iron and silicate minerals.

Among the three types of meteorites, the most stony meteorites, on March 8, 1976, a large-scale meteorite rain landed in Jilin District, Jilin Province, China, which was a stony chondrite rain. This time the meteorite rain scattered up to the range.

In 4 or 500 square kilometers, more than 100 meteorites have been collected, with a total weight of more than 2,600 kilograms. Among them, the largest meteorite No. 1 weighs 1,770 kilograms, which is the heaviest stone meteorite found in the world. In second place is the American Nortonite meteorite, weighing 1079 kilograms.

Iron meteorites are much heavier than stony meteorites, and the heaviest piece is in Namibia, Africa, named Goba meteorite, which weighs 60 tons. A large piece of meteorite in Xinjiang, China, weighs 30 tons, which is the third largest in the world.

Like the surface of the moon, a bumpy rock.

Meteorites are black, smooth and magnetic, and have a slightly larger mass than other rocks of the same volume.